lang: remove unused declarations

src/lang.zig

@@ -3,11 +3,7 @@ const std = @import("std");
 const plugin = @import("plugin.zig");
 const custom = @import("custom.zig");
 
-pub const ParseError = error{
-    OutOfMemory,
-    ArgRequired,
-    ParseFail,
-};
+pub const ParseError = error{ParseFail};
 
 pub const CommandType = enum {
     /// "LV2 Commands" are commands that receive split, index, and then receive
@@ -481,9 +477,6 @@ pub const Command = struct {
 };
 
 pub const CommandList = std.ArrayList(*Command);
-pub const ArgList = std.ArrayList([]const u8);
-
-pub const KeywordMap = std.StringHashMap(CommandType);
 
 /// A parser.
 pub const Lang = struct {
@@ -653,8 +646,6 @@ pub const Lang = struct {
                 self.doError("Unknown command '{}' ({})", .{ command_string, command_string.len });
                 continue;
             }
-
-            // try cmds.append(cmd);
         }
 
         if (self.has_error) return ParseError.ParseFail;